Air-cooled M-9 four-stroke single-cylinder rotary-cylinder-valve internal combustion engine 30.3 kW dl

The engine with calibre ignition is designed for light and ultralight manned and unmanned aircraft equipped with propeller or fan propulsion.
Maximum rated power - 41.3 hp (30.3 kW) at 3000 rpm on PTO
Engine specific gravity - 0.32 kg/hp.
Estimated average specific fuel consumption - not more than 200 g/hp/h at cruising mode.
Engine volume - 490 cm3 (cylinder diameter 88 mm, piston stroke 80 mm), valve bore diameter 32 mm.
Fuel - methyl alcohol (60%), amyl acetate (6%), petrol B-70 (14%), oil MC-20 (20%). In some cases it is allowed to add no more than 5 - 10% nitromethane to the fuel.
Engine altitude - not more than 4500 m.
The engine design uses only rolling bearings, which makes it possible to set the design life of the power plant not less than 2000 hours..